• LT3080 set pin vs output when Vcontrol is 0V


    During my design stage I encountered some issue/question:

    Let suppose that Vcontrol is on (for example 7V), SET has resistor of 330K for 3.3V output.

    Vin is 5V.

    There is no sequencing requirement in the datasheet, so I have a scenario where Vin is…

  • LT3080


    I am using LT3080 im my design to supply voltage to the sensor, the recommend is one 100μF bulk capacitor at the
    regulator side for the sensor.



    Iout = 300mA

    When I change the capacitor output from 2.2uF to 100uF in the simulation…

  • LT3080 Power Supply Rejection Ratio

    I tried to replicate all the the characterization of the PSRR in an LT3080 but I have very different result from the datasheet and simulation

    Here is what the data sheet suggest 

    This is the circuit that I used to bias and the circuit

    This is the simulated…

  • LT3080 LTM4644 MIL specs


    Is there any military spec parts for the 2 components below :




  • LT3080 Thermal Shutdown

    Hi LT, can you please describe the thermal shutdown mode of the LT3080 LDO. I see on the datasheet 2 figures that describe the SOA and current limits relative to the input - output differential and the current limit over temperature. 

    My question is how…

  • RE: Vout calculation of LT3080

    Thanks for the post.  According to the graph you show above, the customer's output voltage load regulation will be best around room temperature and the error due to load regulation will increase a bit at both extreme cold and hot temperatures.  The output…

  • LT3080 Transistor Count


    I am a reliability engineer currently conducting a trade study which includes the LT3080. Is there a factor of 10 estimate for the number of transistors used in this product? 

  • Adding soft-start for LDO LT3080


    I have a question about the below circuit of LT3080, what is the purpose of D1?

    Is that for discharge C2 when the Vin disappeared? 

    Because D1 will affect the accuracy of Vout, I do not want to add D1。

    Best Regards,


  • LT3080 Dropout Voltage

    A customer asks concerning the LT3080:  "We operate at: Vin = 3.3V Vout = 3V, Vcontrol = 5V, output current max. = 200mA. Is this ok?"

    This is a common question so I will answer it myself in a REPLY post.

  • LT3080 SET Pin Voltage

    Dear All,

    In LT3080 datasheet, absolute maximum for SET pin Voltage relative to OUT pin is given as ±0.3V. However, In typical applications circuits on "Adding Shutdown" set pin is clamped to output with 1N4148 which has nominal voltage drop of 1V (higher…